Public bug reported:
It was observed that tumblerd can use 100% of a CPU core when there are
MIDI files present in the directory, either only MIDI files or together
with another file types, and it fails to generate a thumbnail.
If I understood tumblerd, it tries to open/access the file to generate a
relevant thumbnail from it and saves it on a hidden directory with the
name as a hash of the file. What is so strange on this MIDI situation is
that most MIDIs I have are quite small (less than 32 kiB), yet tumberld
can easily take 10 minutes to finish running on a directory with 40 MIDI
files.
I don't know what tumblerd is trying to do with the MIDI files, but
whatever it is doing, it's taking way too long to run. And in the end,
there isn't even a thumbnail :(
I'm using the Thunar file manager with Xfce desktop.
Steps to reproduce:
1) Have tumblerd running;
2) Use the Thunar file manager to access a directory full of MIDI files. A way
to get a directory full of MIDI files without having to resort to anything
other than Ubuntu's repositories is to install simutrans and then go to
/usr/share/games/simutrans/music/
3) Notice how it will take minutes trying to generate the thumbnails (7 on my
computer and still running);
I suspect there is something going on there. Using gdb, I can notice
that it starts and finishes threads multiple times per second when I go
to a directory with many MIDI files, which is a different from images,
other music files (MP3, OGG, ...) and videos. It's as if it was
restarting something over and over.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: tumbler 4.16.0-1
ProcVersionSignature: Ubuntu 5.15.0-22.22-generic 5.15.19
Uname: Linux 5.15.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu78
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Sat Feb 26 22:38:49 2022
InstallationDate: Installed on 2017-06-13 (1719 days ago)
InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: tumbler
UpgradeStatus: Upgraded to jammy on 2019-12-22 (797 days ago)
modified.conffile..etc.cron.daily.apport: [deleted]
** Affects: tumbler (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy third-party-packages
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https://bugs.launchpad.net/bugs/1962380
Title:
tumblerd uses 100% CPU on directories with MID files for a very long
time
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